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Finding the Fourth Proportional to 391,064.96, 539,390.85 and 358,903.24

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Solution

The fourth proportional to 391,064.96, 539,390.85 and 358,903.24 is: 495,030.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,064.96 : 539,390.85 = 358,903.24 : x
  2. Step 2: Convert to fraction form
    391,064.96/539,390.85 = 358,903.24/x
  3. Step 3: Cross multiply
    391,064.96x = 539,390.85 × 358,903.24
  4. Step 4: Simplify right side
    391,064.96x = 193,589,123,691.35
  5. Step 5: Solve for x
    x = 193,589,123,691.35/391,064.96
  6. Step 6: Final answer
    x = 495,030.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.